气候变化领域集成服务门户(CCPortal): Neuromechanical wave resonance in jellyfish swimming

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DOI	10.1073/pnas.2020025118
	Neuromechanical wave resonance in jellyfish swimming
	Hoover A.P.; Xu N.W.; Gemmell B.J.; Colin S.P.; Costello J.H.; Dabiri J.O.; Miller L.A.
发表日期	2021
ISSN	00278424
卷号	118 期号:11
英文摘要	For organisms to have robust locomotion, their neuromuscular organization must adapt to constantly changing environments. In jellyfish, swimming robustness emerges when marginal pacemakers fire action potentials throughout the bell's motor nerve net, which signals the musculature to contract. The speed of the muscle activation wave is dictated by the passage times of the action potentials. However, passive elastic material properties also influence the emergent kinematics, with time scales independent of neuromuscular organization. In this multimodal study, we examine the interplay between these two time scales during turning. A three-dimensional computational fluid-structure interaction model of a jellyfish was developed to determine the resulting emergent kinematics, using bidirectional muscular activation waves to actuate the bell rim. Activation wave speeds near the material wave speed yielded successful turns, with a 76-fold difference in turning rate between the best and worst performers. Hyperextension of the margin occurred only at activation wave speeds near the material wave speed, suggesting resonance. This hyperextension resulted in a 34-fold asymmetry in the circulation of the vortex ring between the inside and outside of the turn. Experimental recording of the activation speed confirmed that jellyfish actuate within this range, and flow visualization using particle image velocimetry validated the corresponding fluid dynamics of the numerical model. This suggests that neuromechanical wave resonance plays an important role in the robustness of an organism's locomotory system and presents an undiscovered constraint on the evolution of flexible organisms. Understanding these dynamics is essential for developing actuators in soft body robotics and bioengineered pumps. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Fluid-structure interaction; Jellyfish; Maneuverability; Neuromechanics; Propulsion
语种	英语
scopus关键词	article; jellyfish; kinematics; muscle contraction; nonhuman; particle image velocimetry; robotics; swimming; velocity
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180245
作者单位	Department of Mathematics, The University of Akron, Akron, OH 44325, United States; Department of Bioengineering, Stanford University, Stanford, CA 94305, United States; Department of Integrative Biology, University of South Florida, Tampa, FL 33620, United States; Marine Biology/Environmental Sciences, Roger Williams University, Bristol, RI 02809, United States; Whitman Center, Marine Biological Laboratory, Woods Hole, MA 02543, United States; Biology Department, Providence College, Providence, RI 02908, United States; Department of Mechanical and Civil Engineering, California Institute of Technology, Pasadena, CA 91125, United States; Department of Mathematics, University of Arizona, Tucson, AZ 85721, United States
推荐引用方式 GB/T 7714	Hoover A.P.,Xu N.W.,Gemmell B.J.,et al. Neuromechanical wave resonance in jellyfish swimming[J],2021,118(11).
APA	Hoover A.P..,Xu N.W..,Gemmell B.J..,Colin S.P..,Costello J.H..,...&Miller L.A..(2021).Neuromechanical wave resonance in jellyfish swimming.Proceedings of the National Academy of Sciences of the United States of America,118(11).
MLA	Hoover A.P.,et al."Neuromechanical wave resonance in jellyfish swimming".Proceedings of the National Academy of Sciences of the United States of America 118.11(2021).